I Was Standing In Line At Sixflags For About An

i was standing in line at sixflags for about an hour. it was almost 90° and everything went black. i became dizzy and sat on the floor in the shade. after 30 minuets i got back up and went back to my mom in line. i began to lose balance and everything became white. i went back to the shade and sat down. what happened when i saw black and white?